GP ZK1 Unloader Valve – 2.3–10.8 GPM, 3600 PSI

Model: ZK1
Category: Pumps → Pump Accessories → Unloaders / Regulators
Type: Flow-Sensitive Unloader Valve – Genuine OEM General Pump

The GP ZK1 Unloader Valve is a genuine OEM General Pump flow-sensitive pressure unloader designed for use with clean, fresh water systems. Featuring a compact, low-profile design, the ZK1 saves installation space while delivering reliable pressure regulation and protection against overpressure and pressure spikes.

Dimensions

• 5.4″ × 4.0″

Specifications

• Flow Range: 2.3–10.8 GPM

• Maximum Pressure: 3600 PSI

• Maximum Temperature: 165°F

• Inlet Port: 3/8″ BSP-F

• Outlet Port: 1/2″ BSP-M

• Bypass Port: 1/2″ BSP-M

Product Details

Brand: General Pump
OEM: Yes – Genuine General Pump Part
Application: Pressure Regulation / Pump Protection
Unloader Type: Flow-Sensitive

Key Features

• Genuine OEM General Pump ZK1 unloader

• Flow-sensitive design for smooth pressure control

• Wide operating range from 2.3 to 10.8 GPM

• Compact, low-profile body saves space

• Durable brass, stainless steel, and Buna-N construction

• Designed for clean, fresh water applications

• Helps protect pumps, hoses, and fittings from pressure spikes